Imagine if RMS brought Lisp OS with Emacs not being bound to GNU/Unix. JITted Emacs since the 2000 and Eshell as the default CLI, with a floating WM as an easy desktop. Multithreaded, own modules for images/PDF and whatever. No need for security, daily backups and rollbacks would be granted. Today you would be 'rewinding in time' from Emacs if any attack happened.